This user has been influenced by too many dialects of English to use one orthography, vocabulary and grammar consistently.
whom
This user insists upon using whom wherever it is called for, and fixes the errors of whomever they see.
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
A, B, and A and B
This user prefers to use the serial commaonly when its omission can be confusing.
’s
Thi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.